JP2002024776A - Ic card reader/writer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the communication precision between a loop antenna element and an IC card by increasing the ratio of the magnetic fluxes utilized for the communication with the IC card among the magnetic fluxes emitted from the loop antenna element, and increasing the utilization efficiency of the magnetic fluxes. SOLUTION: This IC card reader/writer writing information to the IC card by radio waves for recording and reading the information recorded on the IC card is provided with a loop antenna element 2 and a rod-like magnetic member 3 arranged in the loop of the loop antenna element 2 and having high magnetic permeability. The IC card reader/writer is provided with a magnetic member 22 having a shape partially notched on a nearly U-shaped or nearly V-shaped annular body, with both end sections arranged on both face sides of the IC card 5 when the IC card 5 is arranged at the prescribed position, and having high magnetic permeability and the loop antenna element 2 wound on part of the magnetic member 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reader / writer for an IC card which writes and records information on an IC card by radio waves, and reads information transmitted from the IC card as radio waves. The present invention relates to an IC card reader / writer used for a ticket vending machine or the like.

[0002]

2. Description of the Related Art Conventionally, information is written by radio waves as a boarding pass, a commuter pass, a pass, or a facility admission ticket issued at a railway station, a bus, a highway entrance, an amusement park, a theme park, or the like. There has been proposed an IC card capable of recording information and reading the recorded information. In addition, by using an IC card as a prepaid card, an IC card is inserted into a vending machine or the like for use. As an IC card reader / writer used for a ticket vending machine or the like that issues this type of IC card, those shown in FIGS. 7 and 8 have been proposed.
The IC card reader / writer 100 shown in FIG. 7 includes a loop antenna element 101 in which a linear conductor is wound a plurality of times, and a reader / writer main body 102 connected to the loop antenna element 101. Loop antenna element 10
Reference numeral 1 is arranged so that when the IC card 103 is placed at the illustrated read / write position, transmission and reception of radio waves to and from the IC card 103 are effectively performed. The loop antenna element 101 has a loop formed by the
It is formed to be larger than the area of the card 103. The IC card 103 has a loop antenna, a transmission / reception circuit, a control circuit, a memory device, and a power generation circuit (not shown). This power generation circuit converts an electromotive force generated by electromagnetic induction into DC power when receiving a power supply signal (AC magnetic field) transmitted from the loop antenna element 101, and transmits the DC power to a transmission / reception circuit, a control circuit, and a memory device. Supply. When the IC card reader / writer 100 transmits write information to the IC card 103 by radio waves, the loop antenna of the IC card 103 receives the write information, generates reception write information, and the transmission / reception circuit and the control circuit perform the reception. The write information is written and recorded in the memory device. Further, when the IC card reader / writer 100 transmits an information reading command to the IC card 103 by radio waves, the transmitting / receiving circuit and the control circuit of the IC card 103 transmit the information recorded (stored) in the memory device via the loop antenna. Reader / writer for IC card 1
Send to 00. The IC card reader / writer 100
The information transmitted from the IC card 103 is read. In this way, the IC card reader / writer 100
Information is exchanged with the card 103.

The reader / writer 100 for an IC card shown in FIG. 8 has a loop antenna element 104 formed by winding a linear conductor a plurality of times, and a reader / writer body 102 connected to the loop antenna element 104. The loop antenna element 104 is formed so that the range of the loop formed by the loop antenna element 104 is smaller than the area of the IC card 103. The operation of the IC card reader / writer 100 shown in FIG. 8 is the same as that shown in FIG.

[0004]

However, in the IC card reader / writer 100 shown in FIG. 7, the loop formed by the loop antenna element 101 is larger than the area of the IC card 103, and The curvature of the emitted read magnetic flux becomes very small at the outer peripheral edge of the loop antenna element 101.
For this reason, since the magnetic flux at the outer peripheral edge of the loop antenna element 101 does not reach the IC card 103, the IC card 1 out of the magnetic flux radiated from the loop antenna element 101
Since the ratio of the magnetic flux used for communication with the antenna 03 is small and the utilization efficiency of the magnetic flux is low, the loop antenna element 101
There is a problem that the accuracy of communication with the card 103 deteriorates. In addition, an IC card reader / writer 100 shown in FIG.
Since the range of the loop formed by the loop antenna element 104 is smaller than the area of the IC card 103, the ratio of the magnetic flux used for communication with the IC card 102 to the magnetic flux radiated from the loop antenna element 104 is shown in FIG. It will be larger than shown. However, the loop antenna element 1
The curvature of the magnetic flux of the radio wave radiated from the outer periphery of the loop antenna element 104 becomes very small. For this reason, since the magnetic flux at the outer peripheral edge of the loop antenna element 104 does not reach the IC card 103, the proportion of the magnetic flux used for communication with the IC card 103 among the magnetic flux radiated from the loop antenna element 104 as a whole is small. ,
Since the utilization efficiency of the magnetic flux is poor, the loop antenna element 104
There is a problem that the accuracy of communication with the IC card 103 is deteriorated. Further, in the IC card reader / writer 100 shown in FIG. 8 installed in a ticket vending machine or the like, as shown in FIG.
May be disposed near the conductive member 105 such as a metal plate. In this case, of the magnetic flux for reading or writing radiated from the loop antenna element 104, the conductive member 105
Is absorbed by the conductive member 105, so that the proportion of the magnetic flux used for communication with the IC card 103 among the magnetic flux radiated from the loop antenna element 104 as a whole decreases. For this reason, there is a problem that the accuracy of communication between the loop antenna element 104 and the IC card 103 is deteriorated because the utilization efficiency of the magnetic flux is poor. Loop antenna element 101 of IC card reader / writer 100 of FIG.
When the conductive member 105 such as a metal plate exists near the loop antenna element 101 for the same reason as described above.
There is a problem that the accuracy of communication with the IC card 102 is deteriorated. An object of the present invention is to increase the ratio (magnetic flux density) of the magnetic flux used for communication (reading and writing) with the IC card in the magnetic flux radiated from the loop antenna element to improve the magnetic flux utilization efficiency, Antenna element and IC
An object of the present invention is to provide an IC card reader / writer that can improve the accuracy of communication with a card.

[0005]

According to an aspect of the present invention, there is provided an IC card for writing and recording information on an IC card by radio waves and reading the information recorded on the IC card. A card reader / writer, comprising: a reader / writer main body; a loop antenna element connected to the reader / writer main body; and a magnetic member having a high magnetic permeability arranged inside a loop of the loop antenna element. Features. According to a second aspect of the present invention, there is provided an IC card reader / writer for writing and recording information on an IC card by radio waves and reading the information recorded on the IC card, wherein the reader / writer main body and the annular body are connected to each other. A high-permeability magnetic member having a notched portion and having both ends disposed on both sides of the IC card when the IC card is disposed at a predetermined read / write position; and a part of the magnetic member. And a loop antenna element connected to the reader / writer body. According to a third aspect of the present invention, in the second aspect, the end surfaces of the both ends of the magnetic member having a high magnetic permeability are arranged so as to be parallel to both surfaces of the IC card arranged at the read / write position. Features. According to a fourth aspect of the present invention, there is provided the reader / writer for an IC card according to the second or third aspect, further comprising a mold resin member that covers and integrates the loop antenna element with a part of the magnetic member. .

[0006]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic perspective view showing an IC card reader / writer according to one embodiment of the present invention. This IC card reader / writer is, for example,
It is used for a ticket vending machine that issues an IC card, records various information on the IC card, and reads various information recorded on the IC card. As shown in FIG.
This IC card reader / writer 1 includes a loop antenna element 2 formed by winding a linear conductor a plurality of times, a rod-shaped magnetic member 3 having a high magnetic permeability disposed inside a loop of the loop antenna element 2, And a reader / writer body 4 connected to the loop antenna element 2. Note that the loop antenna element 2 may be one in which a linear conductor is wound once. The magnetic member 3 is a substance having high magnetic permeability such as ferrite, for example, a magnetic material, and is formed in a rod shape such as a cylinder or a prism. Reader / writer for IC card 1
Is an IC card 5 arranged at a predetermined read / write position.
The information is written and recorded (stored) by radio waves, and the information recorded on the IC card 5 is read. The IC card 5 receives or records information while being supported by a support member (not shown) provided at a predetermined position near the loop antenna element 2, for example.

FIG. 2 is a block diagram showing a circuit configuration of the reader / writer main body 3. As shown in FIG. 2, the reader / writer body 4 includes a control device 6, a power amplifier 7, and a modulator 8
, Detection demodulator 9, memory device 10, input device 11
And a display device 12 and a transmission / reception device 13. The power amplifier 7 is connected to the loop antenna element 2. The detection and demodulator 9 is connected to the loop antenna element 2. The modulator 8 is connected between the control device 6 and the power amplifier 7. The control device 6 includes a power amplifier 7
, Detection demodulator 9, memory device 10, input device 11
Are connected to the display device 12 and the transmission / reception device 13. The transmission / reception device 13 is connected to an external computer 14.

The control device 6 comprises a CPU, a RAM, a ROM, an input / output port and the like, and supplies a power supply signal, which is an AC signal, and a write command and a read command to the power amplifier 7. The power amplifier 7 amplifies a power supply signal, a write command, and a read command from the control device 6 to generate an amplified power supply signal, an amplified write command, and an amplified read command, and provides the generated signal to the loop antenna element 2. The loop antenna element 2 generates a transmission power supply signal, a transmission write command, and a transmission read command when receiving the amplified power supply signal, the amplified write command, and the amplified read command from the power amplifier 7, and generates a radio wave. Send to IC card 5. Further, the control device 6 includes a memory device 10
The information recorded (stored) is read out and given to the modulator 8 as write information. Further, the control device 6 exchanges information with the external computer 14 via the transmission / reception device 13. The control device 6 is an external computer 1
When receiving the information from 4, the information is given to the modulator 8,
Alternatively, it is stored in the memory device 10. The modulator 8 modulates the write information from the control device 6 to generate modulated write information and provides the modulated write information to the power amplifier 7. Power amplifier 7
Amplifies the modulated write information from the modulator 8 to generate amplified write information and provides the amplified write information to the loop antenna element 2. When receiving the amplified write information from the power amplifier 7, the loop antenna element 2 generates transmission write information and transmits the write information to the IC card 5 as a radio wave. Input device 11
Is for inputting an operation command. The display device 12 displays information from the control device 6. When receiving the transmission read information from the IC card 5, the loop antenna element 2 generates the reception read information and supplies it to the detection demodulator 9. The detection and demodulator 9 detects read information from the received read information from the loop antenna element 2 and supplies the read information to the control device 6. Upon receiving the read information from the demodulator 9, the control device 6 stores (records) the read information in the memory device 10 as the information,
The information is displayed on the display device 12 as necessary, and the information is given to the computer 14 via the transmission / reception device.

FIG. 3 is a block diagram showing a circuit configuration of the IC card 5. The IC card 5 includes a loop antenna 15
, A transmission / reception circuit 16, a detector 17, a control circuit 18,
Memory device 19, power generation circuit 20 and modulator 21
And The transmitting / receiving circuit 16 includes the loop antenna 1
5 is connected. The detector 17 is connected between the transmission / reception circuit 16 and the control circuit 18. Power generation circuit 2
Numeral 0 is connected to the loop antenna 15, the transmission / reception circuit 16, the detector 17, the control circuit 18, the memory device 19, and the modulator 21. The modulator 17 includes the transmitting / receiving circuit 1
6 and the control circuit 18. Control circuit 1
8 is connected to the transmission / reception circuit 16 and the memory device 19. When receiving the transmission power supply signal (AC magnetic field) from the loop antenna element 2, the loop antenna 15 generates a reception power supply signal (AC power) which is an AC signal by electromagnetic induction. The power generation circuit 20 receives the received power supply signal from the loop antenna 15, generates DC power, and transmits and receives the transmission / reception circuit 16, the detector 17, the control circuit 1
8, supply to the memory device 19 and the modulator 21. Note that the IC card 5 may be configured to include a power supply circuit instead of the power generation circuit 20. Loop antenna 1
5 generates a reception write command, a reception read command, and reception write information when receiving a transmission write command, a transmission read command, and transmission write information from the loop antenna element 2, and provides the transmission / reception circuit 16 with it. The transmission / reception circuit 16 supplies the received write information to the detector 17 when receiving the received write information from the loop antenna 15. When the detector 17 receives the received write information from the transmission / reception circuit 16, the detector 17 generates write information and supplies the write information to the control circuit 18. Transmission / reception circuit 16
The control circuit 1 generates a write command and a read command when receiving the reception write command and the reception read command from the loop antenna 15 and
Give 8 The control circuit 18 records (stores) the write information from the detector 17 as information in the memory device 19 when receiving the write command from the transmission / reception circuit 16.
Let it. The control circuit 18 reads the information recorded (stored) in the memory device 19 when receiving the read command from the transmission / reception circuit 16 and reads the information as the read information.
Give to 1. The modulator 21 modulates the read information from the control circuit 18 to generate modulated read information and provides the modulated read information to the transmission / reception circuit 16. The transmission / reception circuit 16 includes the modulator 2
When receiving the above-mentioned modulation read information from No. 1, the modulation read information is given to the loop antenna 15. The loop antenna 15 generates the transmission read information when receiving the modulation read information from the transmission / reception circuit 16 and transmits the transmission read information to the IC card reader / writer 1 by radio waves. In this case, as described above, in the IC card reader / writer 1, when the loop antenna element 2 receives the transmission read information from the IC card 5 and generates the reception read information, the detection demodulator 9 sets the reception demodulator 9 to the reception demodulator 9. The read information is detected from the read information and provided to the control device 6. Control device 6
Receives the read information and causes the memory device 10 to store (record) the read information as the information.

Thus, the reader / writer for IC card 1
When transmitting and receiving information to and from the IC card 5, in the first embodiment of the present invention, as shown in FIG. 1, the loop antenna element 2 and the loop antenna element 2 are arranged inside the loop. Since the magnetic flux of the radio wave radiated from the loop antenna element 1 is concentrated on the magnetic member 3 as shown by the arrow, the curvature of the magnetic flux of these radio waves is reduced. Loop antenna element 2
Also increases at the outer peripheral edge. For this reason, most of the magnetic flux reaches the IC card 5, so that the ratio of the magnetic flux used for communication with the IC card 5 in the magnetic flux radiated from the loop antenna element 2 increases and the efficiency of using the magnetic flux is high. The accuracy of communication between the antenna element 2 and the IC card 5 can be improved. In addition, the first aspect of the present invention
In this embodiment, the loop antenna element 2 and the rod-shaped magnetic member 2 having high magnetic permeability arranged inside the loop of the loop antenna element 2 are provided.
When a conductive member is present near the loop antenna element 2 (as shown in FIG. 9),
The magnetic flux radiated from the loop antenna element 2 is concentrated so as to concentrate on the magnetic member 3 and most of the magnetic flux passes through the IC card 5, so that the magnetic flux is hardly absorbed by the conductive member. For this reason, of the magnetic flux radiated from the loop antenna element 2, the ratio of the magnetic flux used for communication with the IC card 4 increases, and the utilization efficiency of the magnetic flux increases, so that the communication between the loop antenna element 2 and the IC card 5 increases. Accuracy can be improved.

Next, a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 4 is a schematic front view showing an IC card reader / writer according to the second embodiment of the present invention. In the second embodiment of the present invention, the same components as those in the first embodiment of the present invention are denoted by the same reference numerals. As shown in FIG. 4, the IC card reader / writer 1 has a substantially U-shaped high permeability in which both ends are disposed on both sides of the IC card 5 when the IC card 5 is disposed at a predetermined read / write position. A magnetic member 22, a loop antenna element 2 wound around a part of the magnetic member 22, and a reader / writer main body 3 connected to the loop antenna element 2. The magnetic member 22
It may be substantially U-shaped, substantially C-shaped, or substantially V-shaped,
In short, the annular body has a partially cut-out shape, and these cut-out ends (both ends) 22a are arranged so as to face and face both sides of the IC card 5. The other configuration of the second embodiment of the present invention is the same as that of the first embodiment of the present invention. The magnetic member 22 of the embodiment of FIG.
It is a U-shape with one of the four sides completely cut away,
The two ends 22a are opposed (facing) to the IC card 5 as shown in the figure, so that the magnetic force lines having a high magnetic flux density radiated from each end 22a are positioned at the read / write position (in the notch). And can be efficiently used for read / write.
That is, in the second embodiment of the present invention, when the IC card 5 is arranged at a predetermined read / write position, both ends of the IC card 5 are formed by cutting out a part of the annular body. Magnetic member 22 having a high magnetic permeability on which 22a is disposed
And a loop antenna element 1 wound around a part of the magnetic member 22. Therefore, most of the magnetic flux of the radio wave radiated from the loop antenna element 2 reaches the IC card 5 as shown by the arrow, and the magnetic flux radiated from the loop antenna element 2 is used for communication with the IC card 5. Since the ratio of the magnetic flux is large and the use efficiency of the magnetic flux is increased, the accuracy of communication between the loop antenna element 2 and the IC card 5 can be improved. Further, in the second embodiment of the present invention, both ends 22a are arranged on both sides of the IC card 5 when the IC card 5 is arranged at a predetermined position in a shape in which a part of the annular body is cut away. Since the magnetic member 22 has a high magnetic permeability and a loop antenna element wound around a part of the magnetic member 22,
Even when a conductive member is present in the vicinity of the loop antenna element 2, the magnetic flux of the radio wave radiated from the loop antenna element 2 is hardly absorbed by the conductive member. For this reason, the ratio of the magnetic flux used for communication with the IC card 5 out of the magnetic flux radiated from the loop antenna element 2 is large and the utilization efficiency of the magnetic flux is large, so that the communication accuracy between the loop antenna element 2 and the IC card 5 is high. Can be improved. In this embodiment, the end surfaces of both ends 22a of the magnetic member 22 do not necessarily face in parallel with both surfaces of the IC card 5 at the read / write position. However, since magnetic flux as shown is emitted from both end surfaces, There is no hindrance to read / write performance.

Next, a third embodiment of the present invention will be described in detail with reference to the drawings. FIG. 5 is a schematic front view showing an IC card reader / writer according to the third embodiment of the present invention. In the third embodiment of the present invention, the same components as those in the second embodiment of the present invention are denoted by the same reference numerals. As shown in FIG. 5, the reader / writer 1 for an IC card includes a substantially U-shaped magnetic member 23 in which a part of a rectangular annular material (magnetic material) having high magnetic permeability is cut out. It has a loop antenna element 2 wound partly and a reader / writer body 3 connected to the loop antenna element 2. This magnetic member 23
A cutout portion is formed by cutting off a part of one of the four sides constituting the rectangular annular body, and an IC is provided between the end portions 23a located on the respective end surfaces of the two protrusions 23b.
The card 5 is arranged. The space between both ends 23a is a notch, and the inside of the notch is a read / write position for the IC card 5. With the projection 23b, the position of both ends 23a can be closer to the IC card 5, and the end faces of both ends 23a are arranged in parallel with both surfaces of the IC card 5, so that the read / write accuracy is improved. Can be further increased. The magnetic member 23 is formed in a shape in which a part of an annular body such as a substantially U-shape, a substantially C-shape, or a substantially V-shape is cut out in addition to the illustrated shape. Other configurations of the third embodiment of the present invention are the same as those of the second embodiment of the present invention. The third embodiment of the present invention has the same effect as the second embodiment of the present invention, and further has the magnetic member 2
3 have the projections 23b, these projections 23b
Since the magnetic flux concentrates on b, the leakage magnetic flux can be reduced as compared with the second embodiment of the present invention.

Next, a fourth embodiment of the present invention will be described in detail with reference to the drawings. FIG. 6 is a schematic front view showing an IC card reader / writer according to a fourth embodiment of the present invention. In the fourth embodiment of the present invention, the same components as those in the third embodiment of the present invention are denoted by the same reference numerals. As shown in FIG. 6, the reader / writer for an IC card includes a substantially U-shaped magnetic member 23 in which a part of a rectangular annular material (magnetic material) having high magnetic permeability is cut out. A loop antenna element 2 wound around a portion, a reader / writer body 3 connected to the loop antenna element 2, and a mold resin member 2 for covering and integrating the loop antenna element 2 with a part of the magnetic member 23.
And 4. The magnetic member 23 has a cutout formed by cutting off a part of one of the four sides constituting the rectangular annular body as in the embodiment of FIG. 23 located at each end face of
The IC card 5 is arranged between a. The space between both ends 23a is a notch, and the inside of the notch is a read / write position for the IC card 5. The presence of the protruding portions 23b allows the positions of the both end portions 23a to be closer to the IC card 5, thereby improving read / write accuracy. A reader / writer for an IC card according to a fourth embodiment of the present invention includes a molded resin member 24 for integrally covering a magnetic member 23 and a loop antenna element 2 and fixing the loop antenna element 2 to the magnetic member 23. On the side opposite to the notch (read / write position). Magnetic member 2
3 is substantially U-shaped, C-shaped or substantially V-shaped in addition to the shape shown in the figure.
It is formed in a shape in which a part of an annular body such as a character is cut out.
In the fourth embodiment of the present invention, the magnetic member 23 may not have the protrusion 23b. Further, in the fourth embodiment of the present invention, the mold resin portion may be formed so as to cover a portion of the magnetic member 23 except for a portion facing the IC card 5.
In the fourth embodiment of the present invention, the same effect as in the third embodiment of the present invention is obtained, and a mold resin member 24 for fixing the loop antenna element 2 to the magnetic member 23 is provided.
, The loop antenna element 2 is
3 can be prevented from being displaced with respect to 3, and the inconvenience of changing the antenna characteristics can be prevented.

[0014]

As described above, according to the present invention, most of the magnetic flux of the radio wave radiated from the loop antenna element reaches the IC card, and thus the magnetic flux radiated from the loop antenna element Among them, the ratio of the magnetic flux used for communication with the IC card increases, and the efficiency of using the magnetic flux increases, so that the communication accuracy between the loop antenna element and the IC card can be improved. According to the first to fourth aspects of the present invention, even when a conductive member is present near the loop antenna element, the magnetic flux of a radio wave radiated from the loop antenna element is hardly absorbed by the conductive member. Of the magnetic flux radiated from the element
Since the ratio of the magnetic flux used for communication with the C card increases and the efficiency of using the magnetic flux increases, the accuracy of communication between the loop antenna element and the IC card can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing an IC card reader / writer according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a circuit configuration of a reader / writer body according to the first embodiment of the present invention.

FIG. 3 is a block diagram illustrating a circuit configuration of the IC card according to the first embodiment of the present invention.

FIG. 4 is a schematic front view showing an IC card reader / writer according to a second embodiment of the present invention.

FIG. 5 is a schematic front view showing an IC card reader / writer according to a third embodiment of the present invention.

FIG. 6 is a schematic front view showing an IC card reader / writer according to a fourth embodiment of the present invention.

FIG. 7 is a schematic perspective view showing an example of a conventional IC card reader / writer.

FIG. 8 is a schematic perspective view showing another example of a conventional IC card reader / writer.

FIG. 9 is a schematic perspective view showing another example of a conventional IC card reader / writer.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 reader / writer for IC card, 2 loop antenna element, 3 magnetic member, 4 reader / writer main body, 5 IC card, 6 controller, 7 power amplifier, 8 modulator, 9
Detection demodulator, 10 memory device, 11 input device, 12
Display device, 13 transmitting / receiving device, 14 computer,
Reference Signs List 15 loop antenna, 16 transmission / reception circuit, 17 detector, 18 control circuit, 19 memory device, 20 power generation circuit, 21 modulator, 22, 23 magnetic member, 22
a, 23a Both ends, 23b Projection, 24 Mold resin member.

Claims (4)

[Claims] 1. An IC card reader / writer for writing and recording information on an IC card by radio waves and reading the information recorded on the IC card, comprising: a reader / writer main body; and a reader / writer connected to the reader / writer main body. A reader / writer for an IC card, comprising: a loop antenna element; and a magnetic member having a high magnetic permeability disposed inside a loop of the loop antenna element. 2. An IC card reader / writer for writing and recording information on an IC card by radio waves and reading the information recorded on the IC card, wherein the reader / writer main body and a part of the annular body are notched. When the IC card is placed at a predetermined read / write position,
An IC comprising: a magnetic member having high magnetic permeability having both ends disposed on both sides of a card; and a loop antenna element wound around a part of the magnetic member and connected to a reader / writer body. Card reader / writer. 3. The IC according to claim 2, wherein the end faces of the both ends of the magnetic member having a high magnetic permeability are arranged in parallel with both surfaces of the IC card arranged at the read / write position. Card reader / writer. 4. The IC card reader / writer according to claim 2, further comprising a mold resin member that covers and integrates the loop antenna element with a part of the magnetic member. Reader / writer.